| Author: | Chan, Chak Ming Rodney |
| Title: | Study of mitigating UHI effect through enhanced city convection in Hong Kong |
| Advisors: | Law, K. Y. (ME) |
| Degree: | M.Sc. |
| Year: | 2021 |
| Subject: | Winds -- Speed Winds -- China -- Hong Kong Urban climatology Urban heat island Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Mechanical Engineering |
| Pages: | 117 pages : illustrations |
| Language: | English |
| Abstract: | This research studies the wind speed behavior within the Hong Kong Urban context. This aims to explore the correlation between wind speed and thermal sensation, wind speed and solar irradiance. Recommendations were proposed to tackle the Urban Heat Island Effect that are applicable in the Hong Kong circumstance. The hypothesis is to utilize the natural city convection features and manually improve the efficiency in Hong Kong's dense areas. As such, alleviating the issue by reducing the surface temperature. This also maintains a good Thermal comfort amongst pedestrians and minimizes the health risks for people. The methodology is divided into two parts, the approach is divide and conquer, leverages the functions in computational fluent dynamics (CFD). Using two analytical methods to simulate wind flow and pollutants through several buildings in given environments. All models were tailored to Hong Kong Urban Street canyons as reference. The result supports the assumption that thermal comfort can be greatly improved at least 30 % with 0.16 m/s wind speed. This study addresses the effect of irradiance and varying wind speed in changing climatic conditions. The outcome proves that city convection can help local street canyons' environment to reduce radiant heat and surface temperature by 22.3 %. The study suggested practical solutions to achieve neutral thermal sensation for future investigation in the topic. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 6871.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 6.92 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/12423